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freeDSP aurora

An open source and open hardware freeDSP board based on ADAU1452 with 8 analog I/O, S/P-DIF I/O, ADAT I/O, USB Audio, WiFi, Bluetooth.

It supports various and convenient physical addons and multiple software plugins, and is controlled by web interface.

Main features

  • Analog Devices ADAU1452, 294.912 MHz, 32-bit SigmaDSP
    • 6144 SIMD instructions per sample @ 48kHz fs
    • 40kWords of data RAM
    • 800ms digital audio delay pool @ 48kHz fs
    • 8 stereo ASRCs with 139dB DNR
  • XMOS XE216-512-TQ128 for multichannel bidirectional audio streaming
  • ESP32 for WiFi or Bluetooth control
  • AKM AK4458 32bit-DAC
  • AKM AK5558 32bit-ADC
  • Supporting sample rates between 44.1kHz and 192kHz
  • 8 analog balanced input channels, +6dBu
  • 8 analog balanced output channels, +6dBu
  • S/P-DIF input and output
  • ADAT input and output
  • Wordclock input and output
  • Support for display, rotary encoder, volume potentiometer, temperature sensor, PWM controlled fan, IR sensor
  • One freeDSP expansion header
  • USB Audio Class 2 Bidirectional streaming with 8 channels in and 8 channels out, full-duplex. Works with ASIO driver under Windows 10 and driverless under macOS and Linux.
  • Realtime control software over WiFi or Bluetooth available under an open source license
  • THD DAC: -103dB @ 1kHz, 0dBfs, fs=48kHz
  • THD ADC: -101dB @ 1kHz, 0dBfs, fs=48kHz
  • Latency: 1.125ms (talkthrough ADC->DSP->DAC)
  • Board dimensions: 110mm x 110mm



Please take care on which branch you're currently working!


  • master - this branch always holds the latest released revision
  • develop - this is the develop branch with new features. Please base your patches on this branch.

Build instructionsAddons | User Documentation


Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.

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